Transfer to an airtight jar or other glass container. Store in the refrigerator. After 3 days you can enjoy them. They will keep for several weeks.
You can use olive oil in place of the avocado oil, but be advised it will congeal when refrigerated. Before eating your pickled mushrooms made with olive oil, you will want to let them come to room temperature first.Avocado oil is a healthy, yet tasteless oil that does not congeal when cold.